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Use of hydrated lime in water treatment | |
A. | before filtration, reduces the bacterial load on filters. [Wrong Answer] |
B. | after filtration, combats the corrosive-ness of water due to the presence of O2 & CO2. [Wrong Answer] |
C. | is to adjust the pH value. [Wrong Answer] |
D. | all (a), (b) and (c). [Correct Answer] |